1. Wide Range: As mentioned earlier, the variety of raw materials is increasing. Generally speaking, any substance that has cleansing, protective, nourishing, therapeutic, and beautifying effects on human skin, hair, nails, and other external organs can be selected.
2. Effectiveness: The selected raw materials should play a truly effective role in the cosmetic.
3. Targeted Approach: With a wide variety of cosmetics, raw materials should be selected specifically based on the final effect achieved.
4. Compatibility: Cosmetics are complex, multi-faceted systems. Raw materials must have good compatibility within the compound system to ensure the stability of the physicochemical properties of the system.
5. Raw Material Safety: This will be discussed in detail in Part Four.
6. Raw Material Specificity: Some cosmetics possess special functions and therapeutic effects, achieved by adding raw materials with specific effects. Therefore, selection must be based on these specific effects.
7. Raw Material Timeliness: Cosmetics are both daily necessities and consumer products that follow current trends. This requires cosmetic raw materials to be constantly innovated, and the selection of raw materials should reflect the characteristics of the times, current trends, and high-tech content.
